Keymile SUPM1 - Phone-Exchange Mode of Operation; Figure 10: Phone-Exchange Mode

User Manual
SUPM1
page 39 of 94© KEYMILE December 2015 EN/LZTBU 372 129/1 RC
94
Functional Description
5.3 Phone-Exchange Mode of Operation
This mode of operation allows you to set the SUPM1 CAS-signalling accord-
ing to your needs.
Subscribers connected to the SUPM1 can interwork with the exchange side
analogue line card TUXA1 or with any third party equipment.
This mode is used to extend analogue PSTN subscriber lines via a digital
access network.
Figure 10: Phone-Exchange mode
The four CAS signalling bits can be set in accordance with the settings of the
TUXA1 or the third party equipment:
• Towards exchange
− On-hook
−Off-hook
− Ground key
• From Exchange
− Ringing
− Metering pulse
− Polarity reversal
The default CAS bit pattern are set according to the following table:
PSTN signalli ng
to/from time slot
16
Signalling
TDM
64 kbit /s cross
connect
PSTN signalli ng
(out of band ) to
Exchange CAS
PCM64 codec
(G.711 A- law)
Voice channel
(with inband
PSTN signalling )
PSTN signalling
(out of band )
E1 link
Analogue
exchange
signalling data
voice traffic
a/b
Signalling
TDM
64 kbit /s cross
connect
PCM64 codec
(G .711 A -law )
PSTN signalli ng
to/from time slot
16
PSTN signalli ng
(out of band ) to
Exchange CAS
E1 link
Access
Network
SUPM1
SELI8
SELI8
TUXA1
PBUS
PBUS
Table 31: Phone-Exchange mode default signalling
CAS bit State
a b c d from exchange towards exchange
0 0 0 1 Polarity reversal Off-hook
0 1 0 1 - On-hook
1 0 0 1 - Ground key